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Control.com topic...
Power Generation
Topic: Power generation equipment control.
from the Thermal Engineering department...
Thermal Efficiency Improvement of a Combined Cycle Power Plant
Originally posted by Sreesankar J on 29 October, 2014 - 3:18 am
Thermal Efficiency Improvement of a Combined cycle power plant by absorbing excess Flue gas temperature without altering any design parameters.
New Replies:
Can try Increasing feed water flow in HRGS as well. can employ a Temp-Feed water flow logic on the...
Topic: Power generation equipment control.
from the Commissioning department...
Lube oil pressure during speed up
Posted by Mr Handsome on 31 October, 2014 - 5:37 pm
How does the lube oil pressure change during steam turbine speed up?
Topic: Power generation equipment control.
from the Operations department...
Steam turbine shutdown
Originally posted by C. Reihl on 25 October, 2014 - 7:52 pm
What is the proper sequence for shutting down a combined cycle plant? Gas turbine or Steam Turbine first?
New Replies:
THANK YOU for the time and effort to help this old man learn a little something about what is...
Hey dude, I didn't even address your comments! I will do that here. > IF the BPV open as...
JFB, Last night's explanation was a more high leveled one, but you are correct in your...
caleb, If you don't mind, I would like to question you about your comments. First, I have never...
Hey! At our 2x1 plant we have 2 GE MS7001FA's exhausting to HRSGs that provide steam to an...
this makes no sense to me! How do they maintain enough steam to operate the turbine? Do they close...
I'm an combined cycle operator and We shutdown the steam turbine before the Gas turbine. the reason...
Topic: Power generation equipment control.
from the Power generation department...
Generator and Capacitor Bank
Originally posted by fluidflow on 22 July, 2014 - 1:04 am
Totally stumped by the recent brawl over utility of capacitor bank in power generation.
New Replies:
Dear Phil, I will try to send you a scanned copy of Generator Capability Curves, which in my...
Some useful information. Take care G.Rajesh...
FF... Please play particular attention to Candl_Pete's excellent post. He was able to illustrate...
FF, further to my earlier post, see the following Control.Com thread: ...
FF, problem is clearer. Following is a summary, based on information provided to date: A)...
FluidFlow... Do you want me to answer you directly, via control.com, or both? Phil...
Topic: PLCs and related questions.
from the Maintenance department...
Issue with a Siemens 331 AI card
Originally posted by Chris on 28 October, 2014 - 8:31 pm
Experiencing an issue with an output on an AI card. Have a valid analog signal from the field device to the remote I/O PLC, but nothing from there to the control PLC.
New Replies:
I have 6 identical units using the 331 and only one of them has this problem. I suspected a common...
Hello David, Thank you very much for the response and I apologize for the lack of information...
You haven't told us what kind of signal is coming from the level transmitter (presumably 4-20mA),...
Topic: Engineering and workplace issues.
from the Forum department...
Grounding Current Transformers
Originally posted by gautam on 29 October, 2014 - 1:17 am
Need for grounding of secondary terminal of current transformer.
New Replies:
Gautam... Q1: The ground-terminal protects endangerment of human life if there is a...
Topic: Communications systems and equipment.
from the Solar department...
Modbus Training Courses
Originally posted by Kyle on 19 December, 2013 - 9:37 pm
Looking for Modbus training courses
New Replies:
I created a course on uDemy called Mastering Modbus RS485 Network Communication for persons wanting...
Topic: Power generation equipment control.
from the Forum department...
Changing SRV Valve setting
Originally posted by 8784597 on 16 October, 2014 - 4:28 pm
I need help to change the set point for SRV open position.
New Replies:
rwailikhalid, FPRG is a control signal database signal name for P2 Pressure Reference (Fuel...
where i can find FPRG?...
Topic: Power generation equipment control.
from the Power Generation department...
Gas Turbine control - Hardware Part Trip of L4
Originally posted by Neo on 19 October, 2014 - 8:02 am
When Hardware causes the trip of L4
New Replies:
Neo, I'll try to answer your questions, but I'm not clear on at least one of them. Yes; you...
Very happy to see the detailed discussion. Go ahead for great success. Take care G. Rajesh ...
CSA: I read and reread your response,and it really helps! And thanks for your drawings. ...
Okay, Neo, It's important to note that the fuel stop solenoids of GE-design heavy duty gas...
CSA: > So, I'm taking it that you're satisfied with the L4 rung (<Q>...
Originally posted by mohanad on 26 October, 2014 - 1:48 am
I want to send a signal via MODBUS to Emerson DCS
New Replies:
CuriousOne, If I only had a nickel for every time I have heard that refrain I would be a very,...
It is a simple as changing a couple of text files and restarting interfaces....
It's not really clear what mohanad is asking. It could be that he wants to establish an entirely...
We recently converted from Mark5 to Mark6e. We had an existing link to Ovation already. Previous...
The Mark VIe is a control system that uses I/O, so I'm assuming that you don't need data...
Topic: Power generation equipment control.
from the Instrumentation department...
Mark V A6 state
Originally posted by G.Rajesh on 22 October, 2014 - 12:33 pm
Mark V <C> at A6 state after modify and download IO.ASS and IOCFG
New Replies:
Thanks Bob for your feedback. No we couldn't locate the card as when it was at A6 and found...
Did you find out which card in <C> core was not reaching A6? It is possible that a field...
Topic: Engineering and workplace issues.
from the INSTRUMENT department...
Grounding Problem in Siemens DCS
Originally posted by RAJESH on 26 October, 2014 - 4:50 pm
In DCS panel the resistance measured between power earth and signal earth vary from 24 ohm to 160 ohm in different panels.
New Replies:
My apologies, I see now that I misread your post. You should not have that much resistance...
You need to be specific not only with the resistance magnitudes you describe but also how you are...
> resistance between power earth and signal earth is varying from 40 ohm to 120 ohm. It...
Resistance from cabinet instrument ground to ground connection in earthing pit 100-200 milliohms. ...
Topic: Power generation equipment control.
from the DLN combustor department...
Humming in DLN combustor V94.3A
Originally posted by GTEGAT on 3 June, 2009 - 2:14 am
How to fix the humming in combustion chamber when Gas turbine is loading or unloading.
New Replies:
Your GT should have low frequency humming (10-30Hz). If it is the case you should check if the...
Topic: Power generation equipment control.
from the Protective Relaying department...
Transformer Differential Relay Protection during Open-Phase
Originally posted by Amrit Pandey on 17 October, 2014 - 4:55 pm
Transformer Differential Relay Protection during Open-Phase. Possibility of the relay to trip during line to ground fault or open conductor outside the zone of the differential scheme?
New Replies:
Phil, I am emailing you my excel sheet and wiring diagrams. -Amrit...
Amrit... Would you mind sending me a copy of your calcs? Phil...
Phil, Thanks a lot for your help. I agree with you. I was initially not able to evaluate the...
Amrit... OK! Then to summarize, neither phase or ground-fault differential protection can...
Phil, Not completely certain however, I would believe you would want to detect an open-phase...
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